"I went from upper-middle class -- amongst attorneys and surgeons, and hosting study sessions -- to homelessness, seeking shelter wherever it might be. I also gained a fear for my education," she told ABC News.

The two eventually moved to Atlanta where they now live in a hotel. There, Sandra Schmitt receives further treatments after her bone cancer metastasized throughout different parts of her body. Meanwhile, Rebecca Schmitt enrolled into Maynard Jackson High School.

Despite their circumstances, Rebecca Schmitt became her school's valedictorian, earning a 4.2 GPA. She's also the school's tennis captain, and was named most valuable player this year.

Sandra Schmitt

Rebecca Schmitt, a senior at Maynard Jackson High School in Atlanta, battled homelessness to become the school's valedictorian.

The teen said she found strength in her mother.

"I was inspired by her positive attitude during our difficult times," she explained.

"I learned to focus on the positive tools that we have instead of the challenges in life. I began to view the world through a different lens," Rebecca Schmitt continued. "I realized that I had much to be thankful for, and that I had potential."

Sandra Schmitt added that she's "extremely proud of Rebecca for remaining true to her commitment to excellence."

Although she's still undecided about which college she'll attend, Rebecca Schmitt said she's ready for the experience.

"After graduation, I am looking forward to a new beginning," she said.